An automatic drilling device for armed police protective helmets

Abstract

The present invention relates to the technical field of automatic drilling of helmets, and in particular to an automatic drilling device applied to armed police protective helmets, comprising a frame, a lower die fixedly mounted on the frame, a plurality of drilling mechanisms provided on the outer wall of the lower die, the drilling mechanisms comprising a drill bit, a drill sleeve provided on the periphery of the drill bit, a through hole adapted to the drill sleeve provided on the outer wall of the lower die, an expansion assembly provided in the through hole, and a rolling positioning assembly provided on the side of the bottom plate away from the top plate. The present invention not only enhances the strength of the drill bit but also prevents the drill bit from slipping by providing a drill sleeve on the periphery of the drill bit, and the expansion ring 2 cooperates with the through hole of the lower die through a spherical surface, so that the drill sleeve can be adjusted in angle within the through hole, ensuring that its axis is always perpendicular to the hole position to be drilled in the protective helmet, so that the device can adapt to the drilling needs of the curved or irregular surface of the helmet, avoid problems such as skewed drilling and position offset caused by angle deviation, and significantly improve drilling accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic drilling of helmets, in particular to an automatic drilling device applied to protective helmets of armed police. Background Art

[0002] As crucial equipment for protecting the lives of armed police personnel, the quality and performance of protective helmets are crucial. The drilling process is an essential step in the production of protective helmets. Factors such as drilling quality, precision, and efficiency are directly related to the overall quality and performance of the helmets. With the continuous advancement of armed police equipment technology, higher requirements are being placed on the performance and functionality of protective helmets. Faced with diverse and complex drilling requirements, traditional manual drilling methods not only fail to meet the requirements for efficient and precise production, but are also prone to human error, leading to inconsistent product quality and increased scrap rates.

[0003] At present, although the existing automatic drilling equipment for helmets has achieved a certain degree of automation, during the helmet manufacturing process, even helmets of the same size will have certain errors due to factors such as production process and material properties, resulting in slightly different helmet shapes. When dealing with helmets with these slight differences in shape, the existing drilling equipment often lacks an effective adaptive adjustment mechanism and cannot accurately ensure that the drill bit axis is perpendicular to the helmet surface, resulting in deviations in the drilling position, thereby affecting the overall quality and performance of the helmet. In addition, when drilling in a non-vertical state, the drill bit is prone to slipping. Slipping not only prevents drilling from proceeding smoothly, but also aggravates drill bit wear and shortens the drill bit's service life. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the drilling equipment cannot perform adaptive adjustment when dealing with the same batch of helmets with errors, resulting in a decrease in drilling quality, and to propose an automatic drilling device for armed police protective helmets.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an automatic drilling device for armed police protective helmets, comprising a frame, a lower die is fixedly mounted on the frame, the outer wall of the lower die is provided with multiple sets of drilling mechanisms, the drilling mechanisms include a drill bit, a drill sleeve is arranged on the periphery of the drill bit, a through hole adapted to the drill sleeve is opened on the outer wall of the lower die, the drill sleeve is arranged through the through hole, a top plate and a bottom plate are fixedly mounted on the outer wall of the drill sleeve, and the top plate is located on the outside of the lower die and the bottom plate is located on the outside of the lower die. In the cavity of the lower mold, a tightening assembly is provided in the through hole, and the tightening assembly includes an expansion ring 1 mounted on the outer wall of the drill sleeve and an expansion ring 2 rotatably connected to the inner wall of the through hole. The connecting surface between the expansion ring 2 and the through hole is a spherical structure, and its inner diameter gradually decreases in the direction approaching the top plate. The inner conical surface of the expansion ring 2 is adapted to the outer conical surface of the expansion ring 1. A rolling positioning assembly is provided on the side of the bottom plate away from the top plate, and a driving assembly for driving the drill bit to rotate is provided on the side of the top plate away from the lower mold.

[0006] Preferably, a cylinder 1 is fixedly installed on the top of the frame, the telescopic end of the cylinder 1 is vertically downwardly arranged and fixedly connected to the upper mold, the upper mold and the lower mold are coaxially arranged, and the outer wall of the upper mold is provided with multiple through holes, and the multiple through holes respectively correspond to the drill bit positions of multiple groups of drilling mechanisms.

[0007] Preferably, a pushing assembly is provided at the bottom of the upper mold, and a mounting hole is opened at the bottom of the upper mold. The pushing assembly includes a push rod with an I-shaped cross-section, the push rod passes through the mounting hole and is slidably connected thereto, and the outer wall of the push rod is provided with a vertically arranged spring 1, and the two ends of the spring 1 are respectively fixedly connected to the push rod and the inner wall of the upper mold.

[0008] Preferably, a plurality of through grooves evenly distributed around the circumference are provided on the outer wall of the expansion ring 1 at one end close to the top plate, and a rubber layer is provided on the inner wall of the expansion ring 1.

[0009] Preferably, the base plate is elastically connected to the inner wall of the lower mold through spring 2, and the rolling positioning assembly includes a plurality of ball sleeves, which are fixedly installed on the side of the base plate away from the top plate. The plurality of ball sleeves are distributed in a circular array, and a ball is provided in each ball sleeve.

[0010] Preferably, the side of the top plate away from the lower mold is fixedly connected to plate one through multiple guide rods, plate two is arranged between plate one and the top plate, and each guide rod passes through plate two and is slidably connected thereto, an electric cylinder is fixedly installed on the side of plate one away from the guide rod, the telescopic end of the electric cylinder moves axially along the guide rod and is fixedly connected to plate two, the drill bit passes through plate two and is rotatably connected thereto, and the drive assembly includes a motor fixedly mounted on plate two, and the output end of the motor is fixedly connected to the drill bit through a synchronous belt mechanism.

[0011] Preferably, an air passage is provided inside the drill bit, an end of the drill bit close to plate one is fixedly connected to an air inlet pipe through a rotary joint, and the air inlet pipe is connected to the air passage, and an air outlet connected to the air passage is provided at the cutting end of the drill bit.

[0012] Preferably, a dust suction chamber is opened inside the drill sleeve, and a fan is rotatably connected to the inner wall of the dust suction chamber. A dust suction pipe is fixedly connected to the side of the top plate away from the lower mold, and the dust suction pipe is connected to the inside of the dust suction chamber. A plurality of brushes distributed in a circular array are fixedly installed on the inner wall of the dust suction chamber, and the brushes correspond to the cutting end position of the drill bit.

[0013] Preferably, a screen is fixedly installed on the inner wall of the dust collection chamber, the screen is located between the brush and the fan, multiple groups of cutter knives 1 are fixedly installed on the screen, multiple groups of cutter knives 2 are fixedly installed on the side of the fan close to the brush, and the multiple groups of cutter knives 1 and the multiple groups of cutter knives 2 are staggered.

[0014] Preferably, the outer wall of the lower mold is penetrated with a plurality of slots, and a push plate is slidably connected in each slot, and a plurality of cylinders 2 are fixedly installed on the frame, and the telescopic end of each cylinder 2 is fixedly connected to the corresponding push plate.

[0015] Compared with the existing technology, the advantages of the present invention are:

[0016] In the present invention, the drill sleeve plays a guiding role, which not only enhances the strength of the drill bit, but also prevents the drill bit from slipping, effectively ensuring the drilling quality and the service life of the drill bit. The expansion ring 2 cooperates with the lower die through the spherical surface, so that the drill sleeve can be adjusted in angle within the through hole, ensuring that its axis is always perpendicular to the hole position to be drilled in the protective helmet, so that the equipment can adapt to the drilling needs of the curved or irregular surface of the helmet, avoiding problems such as skewed drilling and position offset caused by angle deviation, and significantly improving the drilling accuracy. When the ball contacts and slides with the helmet surface, it can fit the contour of the helmet curved surface in real time and guide the drill sleeve to move and rotate synchronously, so that the drill sleeve always fits the helmet surface, further ensuring the accuracy of the drilling position.

[0017] The present invention drives the expansion ring 1 and the expansion ring 2 to contact and expand by arranging a bottom plate. The expansion ring 1 is tightened inward and forms a reliable clamping force with the cooperation of the rubber layer on its inner wall. The mechanical expansion of the expansion ring is combined with the friction fastening of the rubber layer, which helps to ensure that the drill sleeve is not loose or displaced during the drilling process. Even in the face of vibrations generated by a high-speed rotating drill bit, it can remain stable and avoid drilling quality defects caused by shaking.

[0018] The present invention utilizes ion wind to continuously cool the drill bit and the drilling part during drilling to prevent overheating and softening. The brush can continuously clean the drill bit surface to avoid chip adhesion. The negative pressure dust suction can timely remove the chips to prevent accumulation and blockage, which not only improves the drilling quality, but also significantly extends the life of the drill bit and reduces the equipment maintenance cost. The screen can effectively intercept large chips, and the intercepted chips are broken into small particles through the relative rotation of the cutter one and the cutter two, which effectively prevents the blockage of the dust suction system, ensures the continuous and stable operation of the equipment, and reduces the downtime caused by cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an automatic drilling device applied to armed police protective helmets proposed by the present invention;

[0020] Figure 2 This is a half-section isometric view of an automatic drilling device for armed police protective helmets proposed by the present invention;

[0021] Figure 3 for Figure 2 A partial enlarged view of the X in the middle;

[0022] Figure 4 This is an axonometric diagram of the drilling mechanism of an automatic drilling device for armed police protective helmets proposed by the present invention;

[0023] Figure 5 This is a bottom-up isometric view of the drilling mechanism of an automatic drilling device for armed police protective helmets proposed by the present invention;

[0024] Figure 6 This is a half-section isometric view of the drilling mechanism of an automatic drilling device for armed police protective helmets proposed by the present invention;

[0025] Figure 7 for Figure 6 A partial enlarged view of the Y point in the middle.

[0026] In the figure: 1 frame, 2 upper die, 3 lower die, 4 drilling mechanism, 21 cylinder 1, 22 through hole, 23 push rod, 24 spring 1, 31 cylinder 2, 32 push plate, 41 plate 1, 42 plate 2, 43 top plate, 44 bottom plate, 45 motor, 46 electric cylinder, 47 guide rod, 48 drill bit, 49 drill sleeve, 410 ball, 411 ball sleeve, 412 brush, 413 spring 2, 414 synchronous belt mechanism, 415 air inlet pipe, 416 dust suction pipe, 417 rotary joint, 418 expansion ring 1, 419 expansion ring 2, 420 dust suction chamber, 421 screen, 422 cutting knife 1, 423 cutting knife 2, 424 fan, 425 air duct, 426 air outlet. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Reference Figures 1 to 7 An automatic drilling device for armed police protective helmets includes a frame 1, a lower die 3 is fixedly mounted on the frame 1, a cylinder 21 is fixedly mounted on the top of the frame 1, the telescopic end of the cylinder 21 is vertically downwardly arranged and fixedly connected to the upper die 2, the upper die 2 and the lower die 3 are coaxially arranged, and manipulators (not shown in the figure) for taking helmets are symmetrically arranged on both sides of the frame 1. When the device is working, the manipulator places the protective helmet to be processed in the cavity of the lower die 3, and then the cylinder 21 drives the upper die 2 to move downward in the vertical direction, so that the helmet is completely embedded in the cavity of the lower die 3 under the action of pressure, achieving precise positioning and fixation.

[0029] A pushing assembly is provided at the bottom of the upper mold 2, and a mounting hole is opened at the bottom of the upper mold 2. The pushing assembly includes a push rod 23 with an I-shaped cross-section. The push rod 23 passes through the mounting hole and is slidably connected thereto. The outer wall of the push rod 23 is sleeved with a vertically arranged spring 24. The two ends of the spring 24 are fixedly connected to the push rod 23 and the inner wall of the upper mold 2 respectively. When the upper mold 2 is pressed down, the push rod 23 is abutted by the lower mold 3 and moves upward, and stretches the spring 24 to store elastic energy. After the drilling is completed, the cylinder 21 drives the upper mold 2 to move upward, and the spring 24 releases the elastic potential energy to push the push rod 23 downward to reset, so that the helmet is automatically separated from the upper mold 2, thereby effectively preventing adhesion or jamming between the helmet and the upper mold 2, ensuring smooth demolding of the helmet after processing, improving the operating stability and processing continuity of the device, reducing manual intervention, and improving production efficiency.

[0030] The outer wall of the lower mold 3 is provided with multiple sets of drilling mechanisms 4, and the number and spatial distribution positions of the drilling mechanisms 4 are configured according to the preset drilling process requirements of the protective helmet. The drilling mechanism 4 includes a drill bit 48, and a drill sleeve 49 is provided on the periphery of the drill bit 48. The drill bit 48 performs drilling along the central axis of the drill sleeve 49. The guidance of the drill sleeve 49 helps to improve the strength of the drill bit 48 and prevent slipping. The outer wall of the lower mold 3 is provided with a through hole adapted to the drill sleeve 49. The drill sleeve 49 is arranged through the through hole. The outer wall of the drill sleeve 49 is fixedly installed with a top plate 43 and a bottom plate 44, and the top plate 43 is located on the outside of the lower mold 3, and the bottom plate 44 is located in the cavity of the lower mold 3. An expansion assembly is provided in the through hole, and the expansion assembly includes an expansion ring 418 and a rotating connecting ring arranged on the outer wall of the drill sleeve 49. The expansion ring 2 419 is connected to the inner wall of the through hole. The connection surface between the expansion ring 2 419 and the through hole is a spherical structure, and its inner diameter is gradually reduced in the direction close to the top plate 43. The inner conical surface of the expansion ring 2 419 is adapted to the outer conical surface of the expansion ring 1 418. The outer wall of the expansion ring 1 418 close to the top plate 43 is provided with a plurality of circumferentially evenly distributed through grooves, so that it has radial elastic deformation capability. The inner wall of the expansion ring 1 418 is provided with a rubber layer. The bottom plate 44 is elastically connected to the inner wall of the lower mold 3 through the spring 2 413. A rolling positioning assembly is provided on the side of the bottom plate 44 away from the spring 2 413. The rolling positioning assembly includes a plurality of ball sleeves 411. The plurality of ball sleeves 411 are fixedly mounted on the side of the bottom plate 44 away from the top plate 43, and the plurality of ball sleeves 411 are arranged in a ring array. The distribution is that each ball sleeve 411 is provided with a freely rolling ball 410. When the ball 410 contacts the surface of the helmet, it can slide and guide on the surface of the helmet. During this process, the bottom plate 44 will be subjected to the axial extrusion force, driving the expansion ring 1 418 to move axially along the drill sleeve 49. The expansion ring 1 418 cooperates with the conical surface of the expansion ring 2 419 to cause it to shrink radially. The rubber layer on the inner wall of the expansion ring 1 418 forms a tight fit with the outer surface of the drill sleeve 49 under the action of radial pressure, and the drill sleeve 49 is firmly held. The setting of the rubber layer increases the friction between the expansion ring 1 418 and the drill sleeve 49, which helps to prevent the drill sleeve 49 from shaking or deflecting during the drilling process, further improving the stability and reliability of the drilling. At the same time, the spring 2 413 provides stability A certain axial preload helps to maintain a stable contact pressure. After drilling is completed, when the helmet is taken out of the lower mold 3, the drill sleeve 49 can be reset under the action of spring 2 413, so that the expansion ring 1 418 is disengaged from the expansion ring 2 419. The spherical connection between the expansion ring 2 419 and the through hole allows it to rotate to adjust the angle, so that the axis of the drill sleeve 49 is automatically aligned with the normal direction of the drilling, the verticality of the drilling is improved, and the accuracy of the drilling position is ensured, thereby ensuring the accuracy of the drilling, making the drilled hole meet the design requirements, and improving the processing quality of the protective helmet. In addition, the ability of the drill sleeve 49 to be quickly and accurately positioned and fixed also helps to reduce the time for adjustment and calibration, making the drilling operation smoother, which is beneficial to improving the drilling efficiency and the production efficiency of the protective helmet.

[0031] The top plate 43 is fixedly connected to the plate 1 41 on the side away from the lower mold 3 through a plurality of guide rods 47. A plate 2 42 is provided between the plate 1 41 and the top plate 43. Each guide rod 47 passes through the plate 2 42 and is slidably connected thereto. An electric cylinder 46 is fixedly installed on the side of the plate 1 41 away from the guide rod 47. The telescopic end of the electric cylinder 46 moves axially along the guide rod 47 and is fixedly connected to the plate 2 42. The drill bit 48 passes through the plate 2 42 and is rotatably connected thereto. A driving assembly for driving the drill bit 48 to rotate is provided on the plate 2 42. The driving assembly includes a motor 45 fixedly mounted on the plate 2 42. The output end of the motor 45 is fixedly connected to the drill bit 48 through a synchronous belt mechanism 414 (this is a prior art and will not be described in detail herein). When drilling, The motor 45 drives the drill bit 48 to rotate through the synchronous belt mechanism 414, and the electric cylinder 46 pushes the plate 2 42 to drive the drill bit 48 to move along the guide rod 47. The sliding cooperation between the guide rod 47 and the plate 2 42 provides a high-rigidity linear motion guide rail to ensure that the axial feed path of the drill bit 48 is accurate and the drilling deviation is reduced. Moreover, multiple guide rods 47 form a polygonal constraint structure, which can effectively prevent the plate 2 42 from twisting during the movement, further improving the verticality of the drilling. The outer wall of the upper mold 2 is provided with a plurality of through holes 22, and the plurality of through holes 22 respectively correspond to the positions of the drill bits 48 of the multiple drilling mechanisms 4. The through holes 22 of the upper mold 2 correspond precisely to the drilling mechanism 4, ensuring that the drill bit 48 can pass smoothly and complete the drilling in the mold closing state.

[0032] An air passage 425 is provided inside the drill bit 48. An end of the drill bit 48 close to the plate 1 41 is fixedly connected to an air inlet pipe 415 via a rotary joint 417. The air inlet pipe 415 is connected to the air passage 425. An air outlet 426 connected to the air passage 425 is provided at the cutting end of the drill bit 48. High-pressure ion wind is introduced into the air passage 425 via the rotary joint 417 and continuously ejected from the air outlet 426. The rotary joint 417 allows the air inlet pipe 415 to be fixed while the drill bit 48 rotates, while maintaining an airtight connection, thereby ensuring stable delivery of high-pressure airflow. High-pressure ion wind is ejected from the air outlet 426. Finally, the chips are blown out of the hole directly during the drilling process, which effectively prevents the blockage and deflection of the drill bit 48 caused by chip accumulation, thereby ensuring the consistency of the drill diameter and depth. At the same time, the ion wind reduces the friction between the chips and the drill bit 48, significantly reducing the cutting heat and tool wear. In addition, the ion wind can also neutralize the static electricity generated during the processing, avoiding the composite material dust from being adsorbed on the drill bit 48 or the workpiece surface due to static electricity, ensuring smooth chip removal. The high-speed airflow can also take away the cutting heat, reduce the temperature of the drill bit 48 and the helmet, and prevent the material from being thermally deformed or burned due to high temperature.

[0033] A dust collection chamber 420 is provided inside the drill sleeve 49, and a fan 424 is rotatably connected to the inner wall of the dust collection chamber 420. A dust collection pipe 416 is fixedly connected to the side of the top plate 43 away from the lower mold 3, and the dust collection pipe 416 is communicated with the inside of the dust collection chamber 420. A plurality of brushes 412 distributed in a circular array are fixedly installed on the inner wall of the dust collection chamber 420, and the brushes 412 correspond to the cutting end positions of the drill bit 48. A screen 421 is fixedly installed on the inner wall of the dust collection chamber 420, and the screen 421 is located between the brush 412 and the fan 424. Multiple groups of cutting knives 422 are fixedly installed on the screen 421. Multiple groups of cutting knives 423 are fixedly installed on the side of the fan 424 close to the brush 412. The multiple groups of cutting knives 422 and the multiple groups of cutting knives 423 are staggered. The dust suction pipe 416 is connected to an external negative pressure source to form a stable airflow path in the dust suction chamber 420, ensuring that the chips and dust generated during the drilling process can be sucked away in time. The brush 412 maintains flexible contact with the rotating drill bit 48, and effectively removes the chips and dust adhering to the cutting edge of the drill bit 48 without affecting the movement of the drill bit 48, reducing the wear of the drill bit 48 caused by chips, thereby helping to extend the service life of the drill bit 48. The cutter 1 422 and the cutter 2 423 cooperate to cut the chips intercepted by the screen 421 into a passable size. The stationary cutter 1 422 and the rotating cutter 2 423 form a shearing effect similar to scissors, which helps to efficiently crush the chips, thereby effectively preventing the dust suction pipe 416 from being blocked and reducing equipment downtime for maintenance.

[0034] The outer wall of the lower mold 3 is penetrated by a plurality of slots, each of which is slidably connected to a push plate 32. A plurality of cylinders 2 31 are fixedly mounted on the frame 1, and the telescopic ends of each cylinder 2 31 are fixedly connected to the corresponding push plate 32. After the drilling is completed, the cylinder 2 31 drives the push plate 32 to move upward, pushing the helmet out of the lower mold 3 and lifting it up. Then the manipulator takes the helmet away, which reduces the difficulty of the manipulator taking the helmet and improves the efficiency of taking the helmet.

[0035] When the present invention is in use, the protective helmet is taken out by the manipulators arranged on both sides of the equipment. The manipulator first places the protective helmet to be drilled into the lower mold 3. The surface of the lower mold 3 is provided with a through hole for installing the drilling mechanism 4. The drill sleeve 49 passes through the through hole of the lower mold 3. A tightening ring 1 418 and a tightening ring 2 419 are provided between the drill sleeve 49 and the through hole. The spherical surface of the tightening ring 2 419 cooperates with the through hole so that the drill sleeve 49 can be adjusted to a corresponding angle in the through hole. The cylinder 1 21 drives the upper mold 2 to move downward. The upper mold 2 is provided with a through hole 22 for the drill bit 48 to pass through. The upper mold 2 completely presses the helmet into the lower mold 3, and the push rod 23 is pressed upward during the downward pressing process of the upper mold 2. The ball 410 is installed in the ball sleeve 411 at the bottom of the base plate 44. The ball 410 can rotate freely. While contacting and sliding with the helmet, the drill sleeve 49 moves as a whole and rotates at a certain angle, thereby ensuring that the ball 410 maintains contact with the surface of the helmet and accurately positioning the angle of the drill sleeve 49 so that the axis of the drill sleeve 49 is always perpendicular to the hole position of the drill hole. After the bottom plate 44 is squeezed by the helmet, it pushes the expansion ring 1 418 to move toward the top plate 43, so that the expansion ring 1 418 and the expansion ring 2 419 are in contact and tightened. A through groove is provided on the expansion ring 1 418, so that the expansion ring 1 418 can be tightened inward and hold the drill sleeve 49 firmly. The inner wall of the expansion ring 1 418 is provided with a rubber layer, which helps to increase the friction between the expansion ring 1 418 and the drill sleeve 49. The drill sleeve 49 can be completely fixed by the contact positioning of the ball 410 and the helmet and the clamping effect of the expansion ring 1 418.

[0036] Plate 2 42 moves under the guidance of the guide rod 47, and the motor 45 drives the drill bit 48 to rotate at high speed through the synchronous belt mechanism 414. The electric cylinder 46 pushes plate 2 42 to approach the lower mold 3 at a uniform speed. Under the guidance of the drill sleeve 49, the drill bit 48 drills into the helmet at a uniform speed. During this process, the brush 412 provided in the drill sleeve 49 continuously brushes the surface of the drill bit 48 to ensure the cleanliness and drilling quality of the drill bit 48. High-pressure ion wind is introduced into the air channel 425 in the drill bit 48 through the rotary joint 417, and continuously ejected from the air outlet 426 for cooling and static elimination. The ion wind continuously cools the drill bit 48 and the drilling part during drilling, reduces overheating and softening, ensures drilling quality, and prevents chips from adhering to the drill bit 48, affecting the drilling quality and the service life of the drill bit 48.

[0037] Continuous negative pressure suction is performed through the suction pipe 416 to keep the suction chamber 420 at a negative pressure and suck away the chips generated during the drilling process. The fan 424 rotates continuously following the wind force of the suction, and the screen 421 isolates the suction chamber 420 from the drilling area. A plurality of groups of cutters 1 422 are provided on the screen 421, and a plurality of groups of cutters 2 423 are provided below the fan 424 according to the cutter 1 422. Chips of a certain size can pass through the screen 421 and be sucked away, while chips that are too large are intercepted by the screen 421. The rotating cutter 2 423 cooperates with the stationary cutter 1 422 to separate and break the chips until they pass through the screen 421 and are sucked away, thereby preventing the chips from causing blockage. The blockage affects dust collection and ensures the quality of drilling. Finally, the drill bit 48 drills through the helmet and passes through the through hole 22, then resets at a uniform speed. The brush 412 continues to brush the drill bit 48 to ensure that it is clean enough for the next work. Finally, the upper mold 2 is reset, and the push rod 23 is pushed out under the action of the spring 1 24, so that the helmet is separated from the upper mold 2. Then the cylinder 2 31 drives the push plate 32 to move upward to lift the helmet, and then the manipulator takes the helmet away. Then the cylinder 2 31 is reset. As the helmet leaves, the drill sleeve 49 is reset under the action of the spring 2 413, the expansion ring 1 418 is separated from the expansion ring 2 419, and the drill sleeve 49 is free again, waiting for the next helmet to be drilled.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic drilling device for armed police protective helmets, comprising a frame (1), on which a lower die (3) is fixedly mounted, characterized in that: The outer wall of the lower mold (3) is provided with a plurality of drilling mechanisms (4), the drilling mechanisms (4) include a drill bit (48), the outer periphery of the drill bit (48) is provided with a drill sleeve (49), the outer wall of the lower mold (3) is provided with a through hole adapted to the drill sleeve (49), the drill sleeve (49) is provided through the through hole, the outer wall of the drill sleeve (49) is fixedly provided with a top plate (43) and a bottom plate (44), and the top plate (43) is located outside the lower mold (3), and the bottom plate (44) is located in the cavity of the lower mold (3), and a tightening assembly is provided in the through hole, and the tightening assembly It comprises a first expansion ring (418) sleeved on the outer wall of the drill sleeve (49) and a second expansion ring (419) rotatably connected to the inner wall of the through hole, wherein the connection surface between the second expansion ring (419) and the through hole is a spherical structure, and its inner diameter gradually decreases in the direction close to the top plate (43), the inner conical surface of the second expansion ring (419) is adapted to the outer conical surface of the first expansion ring (418), the side of the bottom plate (44) away from the top plate (43) is provided with a rolling positioning assembly, and the side of the top plate (43) away from the lower mold (3) is provided with a driving assembly for driving the drill bit (48) to rotate.

2. The automatic drilling device for armed police protective helmets according to claim 1 is characterized in that: A cylinder 1 (21) is fixedly installed on the top of the frame (1), and the telescopic end of the cylinder 1 (21) is vertically arranged downward and fixedly connected to the upper mold (2), the upper mold (2) and the lower mold (3) are coaxially arranged, and the outer wall of the upper mold (2) is provided with a plurality of through holes (22), and the plurality of through holes (22) respectively correspond to the positions of the drill bits (48) of the plurality of drilling mechanisms (4).

3. The automatic drilling device for armed police protective helmets according to claim 2 is characterized in that: A pushing assembly is provided at the bottom of the upper mold (2), and a mounting hole is provided at the bottom of the upper mold (2). The pushing assembly includes a push rod (23) with an I-shaped cross section, the push rod (23) passes through the mounting hole and is slidably connected thereto, and a vertically arranged spring (24) is sleeved on the outer wall of the push rod (23), and the two ends of the spring (24) are fixedly connected to the push rod (23) and the inner wall of the upper mold (2), respectively.

4. The automatic drilling device for armed police protective helmets according to claim 1 is characterized in that: The outer wall of one end of the expansion ring (418) close to the top plate (43) is provided with a plurality of through grooves evenly distributed around the circumference, and the inner wall of the expansion ring (418) is provided with a rubber layer.

5. The automatic drilling device for armed police protective helmets according to claim 1 is characterized in that: The bottom plate (44) is elastically connected to the inner wall of the lower mold (3) through a second spring (413). The rolling positioning assembly includes a plurality of ball sleeves (411). The plurality of ball sleeves (411) are fixedly mounted on a side of the bottom plate (44) away from the top plate (43). The plurality of ball sleeves (411) are distributed in a ring array, and a ball (410) is provided in each ball sleeve (411).

6. The automatic drilling device for armed police protective helmets according to claim 1 is characterized in that: The top plate (43) is fixedly connected to the plate one (41) on the side away from the lower mold (3) through a plurality of guide rods (47), and a plate two (42) is provided between the plate one (41) and the top plate (43), and each guide rod (47) passes through the plate two (42) and is slidably connected thereto. An electric cylinder (46) is fixedly installed on the side of the plate one (41) away from the guide rod (47), and the telescopic end of the electric cylinder (46) moves axially along the guide rod (47) and is fixedly connected to the plate two (42). The drill bit (48) passes through the plate two (42) and is rotatably connected thereto. The driving assembly includes a motor (45) fixedly mounted on the plate two (42), and the output end of the motor (45) is fixedly connected to the drill bit (48) through a synchronous belt mechanism (414).

7. The automatic drilling device for armed police protective helmets according to claim 6 is characterized in that: An air passage (425) is provided inside the drill bit (48), and an end of the drill bit (48) close to the plate (41) is fixedly connected to an air inlet pipe (415) via a rotary joint (417), and the air inlet pipe (415) is communicated with the air passage (425). An air outlet (426) is provided at the cutting end of the drill bit (48) and is communicated with the air passage (425).

8. The automatic drilling device for armed police protective helmets according to claim 1 is characterized in that: A dust collection chamber (420) is provided inside the drill sleeve (49), and a fan (424) is rotatably connected to the inner wall of the dust collection chamber (420). A dust collection pipe (416) is fixedly connected to the side of the top plate (43) away from the lower mold (3), and the dust collection pipe (416) is communicated with the inside of the dust collection chamber (420). A plurality of brushes (412) distributed in a circular array are fixedly installed on the inner wall of the dust collection chamber (420), and the brushes (412) correspond to the cutting end position of the drill bit (48).

9. The automatic drilling device for armed police protective helmets according to claim 8, characterized in that: A screen (421) is fixedly installed on the inner wall of the dust collection chamber (420), and the screen (421) is located between the brush (412) and the fan (424). Multiple sets of cutting knives (422) are fixedly installed on the screen (421), and multiple sets of cutting knives (423) are fixedly installed on the side of the fan (424) close to the brush (412), and the multiple sets of cutting knives (422) and the multiple sets of cutting knives (423) are staggered.

10. The automatic drilling device for armed police protective helmets according to claim 1 is characterized in that: The outer wall of the lower mold (3) is penetrated by a plurality of slots, and a push plate (32) is slidably connected in each slot. A plurality of cylinders (31) are fixedly mounted on the frame (1), and the telescopic end of each cylinder (31) is fixedly connected to the corresponding push plate (32).

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